“Your real ROI – a home that finally feels authentic to you. That’s the part clients remember months later. Invoices are the afterthought.“
Kate Killeen
Honestly? This is the conversation I have often, but it’s rarely about the figure people expect.
Every prospective client asks some version of “what does full service interior design cost?” And every time, the real answer takes longer than a sentence, because full service interior design cost isn’t a single number. It’s a design fee, a project budget, a procurement structure, and a handful of terms buried in a contract that most people have never had to read before. Let me walk you through it, the way I’d walk a client through it at my Design Studio in Naples, FL.
What Full Service Interior Design Cost Actually Includes
Full service means your designer guides you through the process, start to finish. It is not a mood board and a shopping list handed to you to execute. Full-service design covers concept development, space planning, comprehensive specifications, 3D renderings for peace of mind. It is also vendor coordination, site visits, final install oversight and styling.
Most clients underestimate the work that happens after they sign the Design Agreement. Full service interior design pays for all of this and so much more!
Vendor coordination alone means tracking purchase orders across three dozen sources (after all, we are bespoke right?), watching lead times that run 12 to 20 weeks on custom pieces, and sequencing deliveries with the contractor so nothing shows up before the walls are ready for it. After the design plan is approved, your only job is to show up for the reveal.
Flat Fee vs. Hourly: Which Structure Fits Your Project
There are three fee structures you’ll run into, and picking the wrong one for your project type is a real risk you want to avoid.
An hourly fee works for small, well-defined scopes — a single-room refresh, a consultation or unpredictable construction oversight hours. For clients, the risk is scope creep. Hours can add up fast and catch you off guard with a bill you didn’t anticipate.
Flat fee is the standard for full service work. Designers (myself included) assess the scope, estimate what it actually takes, and give you one number that covers it. You get cost certainty, and I stay motivated to work efficiently instead of watching a clock.
At Kate Killeen Design, you can expect both. Design and creative work is billed as a flat fee, paid in four installments as the project moves through each phase. Once the design is finalized, the remaining hours — procurement, vendor coordination, admin — are billed separately as a procurement fee, with a built-in retainer that covers those anticipated hours. If procurement hours end up less than expected, you get the difference back.
| Fee Type | Best For | Risk | Cost Certainty |
|---|---|---|---|
| Hourly Rate | Single rooms, consultations | Scope creep | Low |
| Flat Fee | Full-service, multi-room projects | Scope must be clearly defined upfront | High |
| Hybrid | Complex projects with unknowns | Needs a strong contract | Medium–High |
And a design retainer is a deposit that secures your spot on the calendar and kicks off the work. It should be credited against your total fee, not charged on top of it. If a retainer feels disproportionately small for the scope you’re describing, ask why before you sign anything.
What a Realistic Budget Actually Looks Like
Here’s where I see the most confusion, every time: the design fee and the project budget are two different things. The design fee pays for my time and expertise. The project budget is what you’re spending on furniture, fixtures, finishes, and construction. Conflating the two is where sticker shock comes from.
Set your total investment capacity first, add a 15% buffer for surprises, then let the allocation follow. On a full-home project, kitchens and primary suites typically carry the largest share. Living and dining rooms follow. Secondary bedrooms are usually more modest. Outdoor spaces get underbudgeted constantly — especially here in Southwest Florida, where covered lanais and pool areas are practically their own room. Quality outdoor furniture and exterior lighting can cost serious money, and clients often forget to plan for it. Exterior spaces should be an extension of your interior space, not separate. (If you want help thinking through allocation before you’re deep into a project, our Investment Guide breaks down where budget typically goes room by room.)
I cannot stress the importance of decision cadence. It matters more than people think. Pick your ideal furniture layout first — before your finishes, before the fixtures, before the pretty things.
PRO TIP: Layout and space planning always come first. You’ll thank yourself later.
If you skip this critical step, you’ve locked yourself into a palette and design plan you may not have chosen and you will likely feel stuck. Sequencing those decisions correctly is a big part of what a full service designer is actually doing behind the scenes. This is where our expertise and value add comes in.
And honestly? It is worth every penny.
Procurement, Markup, and the Contract Terms Worth Reading Twice
Procurement means sourcing, ordering, receiving, inspecting, and installing everything, across every vendor, in the right order. It’s one of the most labor-intensive parts of this work, and it’s where trade markup comes in.
Designers with trade accounts buy at wholesale and sell the merchandise to you with a mark up — typically below retail.
Sneak Peek BTS: Our Design Agreement explicitly states ‘As a commitment to our clients, we guarantee that all merchandise will always be less than or equal to MSRP.’*
Some designers pass all or part of the discount through and charge a higher flat fee instead. Either model can be fair.
Here’s the Truth: Trade markup is standard in this industry, not a hidden fee. The markup we charge pays for the cost of running the business. A good contract should make clear that markup is part of the pricing model, even if the exact percentage isn’t itemized line by line. Luckily, our clients can sleep well at night knowing they aren’t being overcharged with our MSRP clause.
A few other terms worth reading closely before you sign anything:
- The scope of work definition
- How change orders are priced and approved
- The payment schedule
- The termination clause
That last one gets skipped constantly, and it’s the one that matters most if things don’t go the way anyone planned. Unfortunately, this does happen.
Other common project costs that catch homeowners off guard include, labor costs, custom anything, freight and white-glove delivery fees separate from the furniture cost itself, art and accessories.
PRO TIP: Never omit accessories and styling from your budget. It is what makes your home feel finished.
Here’s My Take
Don’t think of hiring a designer as an added expense. Think of it as the personalized service that prevents the expensive mistakes — like not specifying rough-in locations first, picking the wrong-sized sofa that doesn’t fit through the door, skipping the space planning and moving directly to finish selections, or forgetting to order the fabric for your custom chairs that is now back ordered. The good news? They are all totally avoidable!
Your return on this investment shows up in resale value, sure. But it also shows up in the hours you didn’t spend stressing about the million decisions required to bring a project together. And the result — a home that finally feels authentic to you and how you live. That’s the part clients tell me about months later. Invoices are the afterthought.
One Thing I’d Like You to Remember
A fair full service interior design cost is one you understood completely before you agreed to it — design fees, project budget, procurement terms, and how unexpected surprises are handled. That’s the whole point: a designer that moves you from overwhelm into clarity.
The Takeaway
Here’s the Truth: not every homeowner wants a boutique, principal-led studio managing every detail personally. Some people want a bigger firm with more hands on deck. Totally fair — you do you.
Others want one person who’s close to the work from the first conversation to the final walk-through — someone who knows Naples and Bonita Springs homes, and can tell you exactly what something costs and why. I built Kate Killeen Design for those clients. If that’s you, I’d love to talk.
I only take on a select number of projects at a time. Contact me to start yours.
Not quite ready? Start with our Luxury Home Project Roadmap — no pressure, just clarity for what’s ahead.
Prefer to follow along? Join the Studio Archive — process notes, project thinking, and the interiors we’re living with, straight from the studio.
From The Studio Archive
Kate Killeen is the founder and principal designer of Kate Killeen Design, a boutique luxury interior design studio in Naples, Florida, specializing in high-end custom homes and whole-home renovations across Southwest Florida. Her work has been featured in publications including Naples Illustrated and Florida Design Magazine. In 2026, Kate was recognized by Florida Design’s Seaglass Awards for design excellence. Follow along on Instagram.
The Studio Archive is the editorial home of Kate Killeen Design — a growing collection of essays, project stories, and planning principles for homeowners building, renovating, and furnishing exceptional homes. Read more on why we stay boutique, the private-client standard behind our process, or why professional design is worth the investment.
Frequently Asked Questions
How much does a full service interior designer cost?
Full service interior design cost varies by project scope, square footage, fee structure, and the designer’s experience. Pricing models include hourly rates, flat fees, retainers, or a percentage of the overall project budget. The most accurate answer comes from a design proposal specific to your project.
Do interior designers charge by the hour or flat fee?
Both are common. Hourly suits smaller, undefined scopes. Flat fee suits full service projects with a clearly defined scope, which gives you budget certainty from the start. Some designers use a hybrid: a retainer for planning, then a separate procurement fee or markup on furnishings.
Are there hidden costs in full service interior design contracts?
Worth understanding upfront: trade markup on sourcing, expedite fees, reselection fees if you change direction mid-project, and contractor coordination costs outside the original design fee. A well-written contract spells out what’s included — review the scope, change order terms, and expense clauses closely.
What is a reasonable budget for interior design?
Full service interior design cost depends on your home’s size, finish level, and whether you’re doing a full renovation or a furnishings refresh. Generally, design fees represent a portion of the total project budget, with the remainder covering furniture, fixtures, materials, and contractor work. Luxury projects in markets like Naples, FL will reflect higher-end sourcing. A detailed proposal gets you numbers specific to your home.
*This guarantee applies to in-stock and made-to-order merchandise; fully custom pieces are priced separately.